operating line的用法和樣例：
例句
- A line drawing of this arrangement is shown.
圖示是這種排列的管路圖。 - Seat tightness achieved with torque as opposed to line pressure.
利用扭矩而不是管路壓力來實現閥座的密封。 - A new method is proposed for analysis of oxygen-enrichment and pulverized coal injection using Rist operating line,which will be helpful to improve the injection operation.
首先提出了一種適宜於分析富氧噴煤工藝的高溫區熱平衡計演算法，然後又將其引入到操作線中，最後結合實例運用操作線分析了富氧噴煤后焦比的變化及其置換比。
